Optical and ophthalmic glass with refractive indices nd>1.58,

Details Optical and ophthalmic glass with refractive indices nd>1.58, Optical and ophthalmic glass with refractive indices nd>1.58,

1982-09-30

1984-03-20

McCarthy, Helen M.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 58, 501 59, 501 61, 501 62, 501 63, 501 64, 501 66, 501 67, 501903, C03C 308

Patent

active

044382111

ABSTRACT:
A borosilicate glass composition suitable for use as an eyeglass lens, characterized by having a refractive index nd.gtoreq.1.58, an Abbe number vd.gtoreq.45, a density .rho..ltoreq.2.75 g/cm.sup.3, and an excellent aptitude for chemical hardening, consisting essentially of the following composition, in weight percent:

REFERENCES:
patent: Re23049 (1948-11-01), Armistead
patent: 3898093 (1975-08-01), Faulstich et al.
patent: 4084978 (1978-04-01), Sagara

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